血管支架是置于动脉管内的金属套管，用于在清除血管阻塞医学治疗后维持血管畅通。
Stents are metal sleeves inserted in arteries to keep them propped open after medical procedures to clear blockages.
在尾管内下封隔器，循环确信尾管环空畅通后下入水泥承留器固井。
The liner was cemented by cementing retainer after its annular was assured expedite by setting packer in liner and making circulation.
下部特殊管件设计，消除水舌、水塞、水壅等现象，保持立管内空气畅通，有效保证管道内的压力平衡，可大幅度提高系统的排水能力。
Upper and under connection design which avoid water block, keep air smooth in the pipe, sure the pressure balance in the pipe, is good to improve drainage ability.
下部特殊管件设计，消除水舌、水塞、水壅等现象，保持立管内空气畅通，有效保证管道内的压力平衡，可大幅度提高系统的排水能力。
Upper and under connection design which avoid water block, keep air smooth in the pipe, sure the pressure balance in the pipe, is good to improve drainage ability.
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